15. The researchers cited in the previous problem (Liguoriand Robinson, 2001) also examined the effect of caf-feine on response time in the driving simulator. In asimilar study, researchers measured reaction time30 minutes after participants consumed one 6-ounce cupof coffee. Using the same driving simulation task, forwhich the distribution of reaction times is normal withu = 400 msec and o = 40, they obtained a mean ofM = 392 for a sample of n =a. Are the data sufficient to conclude that caffeine hasa significant effect on reaction time? Use a two-tailed test with a = .05.36 participants.%3D%3DD. Compute Cohen's d to estimate the size of theeffect.C. Write a sentence describing the outcome of thehypothesis test and the measure of effect size as itwould appear in a research report.- porth-

Name: 15. The researchers cited in the previous problem (Liguoriand Robinso
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Description: 15. The researchers cited in the previous problem (Liguoriand Robinson, 2001) also examined the effect of caf-feine on response time in the driving simulator. In asimilar study, researchers measured reaction time30 minutes after participants consume

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Linear Algebra: A Modern Introduction

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Author:David Poole

Publisher:David Poole

Chapter7: Distance And Approximation

Section7.3: Least Squares Approximation

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15. The researchers cited in the previous problem (Liguori
and Robinson, 2001) also examined the effect of caf-
feine on response time in the driving simulator. In a
similar study, researchers measured reaction time
30 minutes after participants consumed one 6-ounce cup
of coffee. Using the same driving simulation task, for
which the distribution of reaction times is normal with
u = 400 msec and o = 40, they obtained a mean of
M = 392 for a sample of n =
a. Are the data sufficient to conclude that caffeine has
a significant effect on reaction time? Use a two-
tailed test with a = .05.
36 participants.
%3D
%3D
D. Compute Cohen's d to estimate the size of the
effect.
C. Write a sentence describing the outcome of the
hypothesis test and the measure of effect size as it
would appear in a research report.
- porth-

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Given:

$μ = 400 σ = 40 M = 392 n = 36 α = 0.05$

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